Civil rights icon Lowery celebrates 90th birthday

On Sunday night in Atlanta, Lowery was praised for his living legacy as he continues to fight against hunger, poverty, racism and injustice. He has lived to see an end to segregation and the rise of the nation's first black president, and says there is still work for him to do on issues of social justice and equality.

In a brief video tribute, Obama thanked Lowery for his friendship and counsel, saying, "I don't know where this country would be without your leadership."